Prologue wa Ashita Iro / Milky Holmes
| Composed by | Atsushi Harada |
| Arranged by | Atsushi Harada |
| Published by | Lantis |
| Catalog number | LACM-4985 |
| Release type | Game Soundtrack - Official Release |
| Format | 1 CD - 4 tracks |
| Release date | August 29, 2012 |
| Genres |
M-01 - PSP Game "Tantei Opera Milky Holmes 2" Opening Theme
Composer: 森慎太郎
Arranger: 森慎太郎
Lyricist: Saori Codama
M-02 - PSP Game "Tantei Opera Milky Holmes 2" Ending Theme
Composer: Atsushi Harada
Arranger: Atsushi Harada
Lyricist: Saori Codama
| 1 | プロローグは明日色 |  | |
| 2 | バイバイエール！ | | |
| 3 | プロローグは明日色 （Off Vocal） | | |
| 4 | バイバイエール！ （Off Vocal） | |
